Kate Beckinsale and her Underworld director Len Wiseman are parting ways - at least in their personal lives.

The married collaborators' 12-year relationship is coming to an end, as TMZ reports that Len has filed for divorce from the London-born Hollywood superstar.

In initial court filings, Wiseman has blamed irreconcilable differences for the breakdown of his and Beckinsale's high-profile marriage. Digital Spy has reached out to representatives for the couple for comment.

Beckinsale and Wiseman met and fell in love on the set of the original Underworld movie, and would later collaborate on a critically-panned remake of Total Recall.

Shortly after they tied the knot, Beckinsale admitted that she tried to resist a romance with her Underworld director: "It was one of those things that was happening but that we tried to pretend was not happening for a long time. Len and I were both with other people at the time, and the whole thing was really difficult.

"We made the film, and it wasn't until after it had finished that it finally dawned on me how much I liked him. I knew within five minutes of kissing Len that I would marry him."

While they're no longer together as a couple, Wiseman remains a producer on Beckinsale's upcoming Underworld sequel Blood Wars.